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<div><a href="../index.html">Home</a> &gt;  <a href="index.html">fvcom_prepro</a> &gt; elems2nodes.m</div>

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<h1>elems2nodes
</h1>

<h2><a name="_name"></a>PURPOSE <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="box"><strong>Transfer a field from elements to vertices</strong></div>

<h2><a name="_synopsis"></a>SYNOPSIS <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="box"><strong>function [fieldout]  = elems2nodes(fieldin,Mobj) </strong></div>

<h2><a name="_description"></a>DESCRIPTION <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="fragment"><pre class="comment"> Transfer a field from elements to vertices  

 [fieldout] = function elems2nodes(fieldin,Mobj)  

 DESCRIPTION:
    Smooth a vertex based field 

 INPUT
    Mobj         = Matlab mesh object
    fieldin      = element-based field

 OUTPUT:
    fieldout = vertex-based field

 EXAMPLE USAGE
    f = smoothfield(fc,Mobj)

 Author(s):  
    Geoff Cowles (University of Massachusetts Dartmouth)

 Revision history
   
==============================================================================</pre></div>

<!-- crossreference -->
<h2><a name="_cross"></a>CROSS-REFERENCE INFORMATION <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
This function calls:
<ul style="list-style-image:url(../matlabicon.gif)">
</ul>
This function is called by:
<ul style="list-style-image:url(../matlabicon.gif)">
<li><a href="example.html" class="code" title="">example</a>	example demonstrating reading in a 2DM file and constructing a model</li></ul>
<!-- crossreference -->



<h2><a name="_source"></a>SOURCE CODE <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="fragment"><pre>0001 <a name="_sub0" href="#_subfunctions" class="code">function [fieldout]  = elems2nodes(fieldin,Mobj)</a>
0002 
0003 <span class="comment">% Transfer a field from elements to vertices</span>
0004 <span class="comment">%</span>
0005 <span class="comment">% [fieldout] = function elems2nodes(fieldin,Mobj)</span>
0006 <span class="comment">%</span>
0007 <span class="comment">% DESCRIPTION:</span>
0008 <span class="comment">%    Smooth a vertex based field</span>
0009 <span class="comment">%</span>
0010 <span class="comment">% INPUT</span>
0011 <span class="comment">%    Mobj         = Matlab mesh object</span>
0012 <span class="comment">%    fieldin      = element-based field</span>
0013 <span class="comment">%</span>
0014 <span class="comment">% OUTPUT:</span>
0015 <span class="comment">%    fieldout = vertex-based field</span>
0016 <span class="comment">%</span>
0017 <span class="comment">% EXAMPLE USAGE</span>
0018 <span class="comment">%    f = smoothfield(fc,Mobj)</span>
0019 <span class="comment">%</span>
0020 <span class="comment">% Author(s):</span>
0021 <span class="comment">%    Geoff Cowles (University of Massachusetts Dartmouth)</span>
0022 <span class="comment">%</span>
0023 <span class="comment">% Revision history</span>
0024 <span class="comment">%</span>
0025 <span class="comment">%==============================================================================</span>
0026 subname = <span class="string">'elems2nodes'</span>;
0027 <span class="comment">%fprintf('\n')</span>
0028 <span class="comment">%fprintf(['begin : ' subname '\n'])</span>
0029 
0030 <span class="comment">%------------------------------------------------------------------------------</span>
0031 <span class="comment">% Parse input</span>
0032 <span class="comment">%------------------------------------------------------------------------------</span>
0033 
0034 <span class="keyword">if</span>(exist(<span class="string">'fieldin'</span>)*exist(<span class="string">'Mobj'</span>) == 0)
0035     error(<span class="string">'arguments to elems2nodes are missing'</span>)
0036 <span class="keyword">end</span>;
0037 
0038 <span class="keyword">if</span>(length(fieldin) ~= Mobj.nElems)
0039     error(<span class="string">'field size in elems2nodes is not the same as number of elements in Mesh'</span>)
0040 <span class="keyword">end</span>;
0041 
0042 <span class="comment">%------------------------------------------------------------------------------</span>
0043 <span class="comment">% Tranfser</span>
0044 <span class="comment">%------------------------------------------------------------------------------</span>
0045 fieldout = zeros(Mobj.nVerts,1);
0046 count    = zeros(Mobj.nVerts,1);
0047 
0048 <span class="keyword">for</span> i=1:Mobj.nElems
0049     n1 = Mobj.tri(i,1);
0050     n2 = Mobj.tri(i,2);
0051     n3 = Mobj.tri(i,3);
0052     fieldout(n1) = fieldout(n1) + fieldin(i);  count(n1) = count(n1) + 1;
0053     fieldout(n2) = fieldout(n2) + fieldin(i);  count(n2) = count(n2) + 1;
0054     fieldout(n3) = fieldout(n3) + fieldin(i);  count(n3) = count(n3) + 1;
0055 <span class="keyword">end</span>;
0056 fieldout = fieldout./real(count);
0057 
0058 <span class="comment">%fprintf(['end   : ' subname '\n'])</span>
0059</pre></div>
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